Polymer blending is one of the appropriate method for developing polymer properties and reinforcement of their drawbacks. The weak point of incompatible polymer blend is their weak interfacial that couldn’t prohibit dispersed phase from coalescence. Reactive compatibilization of polymer blend with reaction among polymer active groups in the interphase induces interphase thickening and morphological stability. PET/PA66 polymer blend has high potential to reactive blending due to various active groups along their chains. However due to short time of melt blending, the extent of reaction isn’t enough to gain phase stability. So the use of chemicals that could react with both polymer -like epoxy resin-as an effective compatibilizer for coupling two polymer in interphase is common. On the other side solid state polymerization could make a suitable condition for reaction among polymer chains while polymer degradation is prohibited. The effect of on the extent of interphase reaction between PET and PA66 polymer chains was investigated by measuring rheological and morphological properties of PET/PA66 polymer blend. Further more investigation was carried out to compare the extent of reaction between PET/PA66 and PET/PA66/EPOXY polymer blend before and after . The results indicated that process was successful to stabilize the blend morphology. The obvious increase in morphological stability was attributed to the increase in reaction among polymer chains in interphase. Also, the influence of end group concentration in compatibilization of blend was studied. The results show the positive effect of increasing eng group concentration on the extent of reaction in the interphase.
